Mechanical stop motion for looms



Nov. 29, 1949 G. F. BAHAN MECHANICAL STOP MOTION FOR LOOMS 2 Sheets-Sheet 1 Filed May 28, 1948 Nov. 29, 1949, G BAHAN 2,489,849

MECHANICAL STOP MOTION FOR LOOMS Filed May 28, 1948 2 Sheets-Sheet 2 GEORGE F. BAH/1N Patented Nov. 29, 1949 MECHANICAL STOP MOTION FOR LOOMS George F. Bahan, Greenville, S. 0., assignor t Bahan Textile Machinery Company, Inc.

Application May 28, 1948, Serial N 0. 29,812

2 Claims.

This invention relates to improved means associated with a loom whereby the shipper handle can be automatically knocked to an off position by means disposed at both sides of the loom.

Heretofore looms have usually been equipped with a live frog and a dead frog, the live frog being a sliding frog disposed on one side of the loom adjacent the shipper handle so that when a shuttle is not properly boxed, the protection rod which is slightly oscillated when a shuttle is not in a shuttle box will not be reversely oscillated to raise the daggers on the protection rod, thus allowing the dagger to engage the live frog and move the knock off lever which in turn would move the shipper handle in such a manner as to cause the loom to stop. It often happens that the fixed or dead frog would be engaged by the dagger on the opposite side of the loom from the live frog and this would arrest oscillation of the lay and jam the loom and stop the beat-up operation. This also would prevent the dagger assoelated with the live frog from moving far enough to engage the live frog and consequently, the shipper handle would not be moved to an off position, although the loom had been stopped by jamming, the driving power still being on and slippage of the clutch occurring or breakage of loom parts taking place.

In this invention, the fixed or dead frog is omitted from the loom and is replaced by a sliding frog which is very similar to the live frog disposed on the other side of the loom. A connection is made between the second live frog and the conventional knock-off lever whereby the dagger at the end of the loom on which the dead frog has heretofore been disposed will engage the second live frog and will thus impart partial rotation to a shaft to which the second live frog is connected and thus actuate the knock-01f lever associated with the shipper handle to move the same to knock off position. This result is obtained by connecting one end of a link to one side of the second live frog, the other end being connected to a lever arm which is fixedly mounted on a shaft extending crosswise of the loom and disposed adjacent the breast beam of the loom and this transverse shaft is oscillatably mounted within a tubular shaft which replaces the conventional starting rod but still performs the same function of the conventional starting rod with the exception that it is tubular to thereby allow provision for the new shaft which is oscillatably mounted therein and this new shaft has, on the other end thereof a knock-off finger which is adapted to engage the front surface of the conventional knock-ofi lever associated with the shipper handle, and thus, when a shuttle is not present in either the right hand or left hand boxes disposed on the two ends of the lay of the loom, both of the daggers may move downwardly at their free ends and at least one of the daggers. will engageone of the two live frogs. If a dagger engages the conventional frog, the loom will be stopped in the conventional manner, and if a. dagger engages the second live frog, it will cause.- it to move forwardly and thereby impart partial rotation to the new transverse shaft to cause the knock-off finger on the shaft to move the knockoff lever rearwardly at its upper end and thus move the shipper handle out of a retaining notch in the sidewall of the conventional slot in the conventional shipper lock of the loom and allow the shipper handle under its conventional spring tension to move rearwardly at its upper end and thus stop the loom.

It is therefore an object of this invention to provide a live frog mounted on both sides of the loom whereby a dagger on each side of the loom, which is integral with the conventional protection rod, may engage either one or both of the live frogs and thus transmit movement to the shipper handle to shut off the loom.

Another advantage of having two live frogs is that if something happens to the conventional left-hand live frog, such as the steel plate flying out, or the bolt which holds the plate which engage the knock-off lever becoming loose, or if one of the swords should break, or other parts get out of order, the presence of two live frogs will insure quick stoppage of the loom. This is all the more important under present conditions when all looms are operated at least ten to twenty picks per minute faster than a few years ago.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawings, in which Figure 1 is a top plan view of the front portion of a loom with portions broken away;

Figure 2 is a front elevation of the upper portion of a loom showing the improved apparatus associated therewith;

Figure 3 is an enlarged elevation with parts in section taken along the line 33 in Figure 1 and. showing other parts of the loom associated therewith;

Figure 4 is an elevation with parts in section taken along the line 4-4 in Figure 1 and showing the connection between the right-hand live frog and the oscillatable shaft;

Figure 5 is an isometric view showing the conventional shipper lock for locking the shipper handle in an on position.

Referring more specifically to the drawings, the numerals H) and H indicate the right and left hand side frames of a loom which are bridged by a conventional arch 13 intermediate their ends and are bridged at their front ends by a breast beam [4.

Disposed between the side frame members In and II and adjacent the same, are conventional swords l6 and I! which are oscillatably mounted at their lower ends on a conventional rocker shaft, not shown, and are secured to a lay at their upper ends. The lay 20 has a conventional race plate 2! and shuttle boxes 23 and 24 disposed at each end thereof, each of which has a conventional binder 25 which are pivoted in a conventional manner at their outer ends and these binders are engaged at the rear surfaces of the same by the upper ends of conventional dagger fingers 26, which are disposed on each end of a conventional protection rod 27.

The shuttle boxes 23 and 24 are adapted to intermittently receive a shuttle so (Figure 4) which is propelled by conventional picker sticks 42 from one shuttle box to the other, and the upper ends of these picker sticks 42 are disposed within the shuttle boxes 23 and 24 and they are caused to oscillate by conventionalpick cams, not shown, disposed at each side of the loom. This type of loom is also equipped with a suitable take-up or sand roll 45 which is driven by a conventional means, not shown, and this loom also has a shipper handle 45 which is normally urged, by conventional means, not shown, to inoperative or knock-off position.

The left-hand side of the loom has a conventional shipper lock mounted thereon having a slot 5| extending longitudinally thereofin which the upper end of the shipper handle is guided and that side of the slot 5| which is adjacent the front end of the loom has a cavity 52 therein (Figure5) in which the shipper handle is adapted to rest during the operation of the loom, that is, while the shipper handle is in an-operating position.

A loom of this type is also equipped with a knock-01f lever 55 pivoted as at 56 and having an outwardly projecting portion 51 integral therewith (Figure 2) and this is adapted to engage the shipper handle immediately below the shipper lock 56 for moving it out of the cavity 5! to allow the shipper handle to move from the position shown in Figure 1 to the left, by conventional spring, means disposed at the lower portion of the shipper handle, not shown, and to thus stop the loom.

This type-of loom is also equipped with a conventional live or sliding frog 69 (Figures 1 and 3) which has a forwardly projecting plate 6| secured thereto, the outer end of which is adapted to engage the lower end of the knock-off lever 55 to thus move the shipper handle ifi out of the cavity 52 in the shipper lock 58 andallow it to move to inoperative position. This conventional live frog 50 is disposed at the left-hand side of the loom and is adapted to be engaged by a dagger 63 which extends forwardly from the protection rod 21 to which it is secured. When a shuttle is not properly boxed in either one of the shuttle boxes, the dagger 63- normally movesdownwardly under pressure of a torsion spring 64 (Figure 1) which is disposed around the protection rod 21;, and one end of which is-anchoredto a collar 65 4 secured on the protection rod 21 and the other end of which is anchored to a bracket 66 which is secured to the lower surface of the lay 2|].

It is thus seen that the torsion spring 64 caused the protection rod 2! to move in a clockwise manner in Figures 3 and 4 and thereby press the free proximate ends of the binders 25 disposed in the shuttle boxes 23 and 24 forwardly against the side of a shuttle when there is one boxed in either one of the shuttle boxes 23 and 24.

Now, in the event that there is not a shuttle in either one of the shuttle boxes 23 or 24, it is a well known fact that the dagger 63 engages the frog 60 and moves the knock-off lever 55 to thereby stop the loom. That is, provided that forward movement of the lay is not restricted by the dagger disposed at the other end of the loom engaging the conventional dead frog at the other end of the lay.

It very often happens in this type of loom, that when a shuttle is not properly boxed in one of the shuttle boxes 23 or 24 the dagger 61 which projects forwardly from the protection rod 21, adjacent its right-hand end, as viewed in Figure 1, there normally being a dead or fixed frog on this side of the loom, will engage the fixed frog before the dagger 63 on the left-hand side of the loom has moved the live frog 60 far enough forwardly to cause the knock-01f lever 55 to move the shipper handle 46 from the cavity 52 and thus the loom will be caused to stop very suddenly and various damage may occur.

Therefore, I have provided a sliding frog Ill which, as may be observed in Figure 4, is disposed at the same location at which the dead fixed frog is normally located. This frog it has a portion 12 provided with a blade 13 and this live frog 10 has forwardly projecting ears i4 integral therewith which are adapted to be guided by an upwardly projecting portion 15 of the side frame member ID, the side frame member I0 having a conventional machined portion 11 which is disposed on the horizontal upper rib portion of the frame member l0 and the conventional fixed frog has heretofore been mounted on this rib portion 11. In the present invention, the live frog 10 has horizontal sliding movement on this rib portion 11, whenever it is engaged by the free end of the dagger 61 on a beat-up stroke of the lay 20.

Pivotally connected, as at 80 (Figure 4) to the enlarged portion 12 of the live frog I0 is one end of a horizontally disposed link 8i which extends forwardly and is pivotally connected at its other end, as at 82, to the lower end of an arm 83, havingabearing portion 84 (Figure 2) integral there-- with, which is secured, by any suitable means such as set screws 85, to one end of a transverse horizontally disposed shaft 86.

It may be seen that the link 8| could be pivotally. connected to the opposite side of the enlarged portion 12 of the live frog 70, if so desired, in which event the horizontally disposed link 8| would be disposed on the outside of theside frame member If), rather than inside of the: side frame member ID, and the arm 83 would then be turned aroundopposite from the position shown in Figure 2 to accommodate the free end of thelink 8|.

The transverse shaft 35 is an internal shaft in that it is osoillatabl mounted in the tubular shaft 99 which is also mounted in the conventional bearing blocks 9i which are secured to the" front-vertical surface of the breast beam l4, ad-

jacent the proximate surfaces of the side frame members I0 and H.

This tubular shaft 60 serves the same purpose as the conventional starting rod of the loom, the only exception being that it is made tubular instead of solid, to accommodate the transverse shaft 86 which has oscillatory motion therein. This shaft 9t has the conventional starting rod arm 88 and a conventional filling motion finger $2 fixedly mounted thereon, and these parts 93 and 92 are shown by way of illustration only, to bring out the fact that the normal function of the starting rod has not been interrupted by the application of this invention to the loom.

The transverse shaft 85 extends entirely through the shaft 90 and extends beyond the same at its other end and has fixedly mounted thereon, by any suitable means such as set screws 95, a knock-off finger 95 (Figures 1, 2 and 3) and which extends outwardly and upwardly on an angle and its free end is penetrated by a restricted portion Q7 of a pressure pad 93 and this restricted portion a? is threaded for reception of a lock nut es to time secure the pressure pad 98 to the knock-off finger at. This pressure pad 98 is adapted to engage the upper end of the conventional knock-off lever 55.

It is thus seen, that in the event that the lefthand dagger 63 should not engage the left-hand frog 60, the right-hand dagger 66 will engage the new frog I and move it to the right in Figure 4 to thus cause the link member 8| to move outwardly, and the free end of the same being pivotally secured to the arm 83, the arm 83 will move in a counterclockwise direction, as observed in Figure 4, and will thus impart partial rotation to the internal shaft 86 in a counterclockwise direction as observed in Figure 4 to thus cause the knock-off finger 96 to move inwardly at its upper end.

The upper end of the knock-off arm 95, being in engagement with the upper end of the conventional knock-off lever 55 will cause the same to move inwardly whereby it will move the shipper handle out of the cavity 52 in the shipper lock 50 and the ship er handle will then move from the right-hand end of the slot 5I to the left by conventional means, not shown, to thus shut off the loom.

It is thus seen that the shipper handle 46 will also be moved out of the cavity 52 regardless of whether one or both of the daggers 63 and 6! engage the frogs and thus the loom will be stopped in a normal manner, and this, of course, eliminates the sudden stoppage of the 100m as would be caused in the event that the dead frog were in use.

By referring to Figure 3, there may be observed other conventional parts of the loom which are provided on some types of looms and comprise among other parts, a conventional brake wheel II!) which is fixedly secured on one end of a conventional drive shaft III and there is shown a conventional brake member I I2 which is adapted to engage the brake wheel III] and which is pivotally connected as at [I3 to the vertical side frame member I I and this brake member I I2 has a conventional brake rod Ill extending from the same which is pivotally connected at its front end as at H5, to one side of the conventional live frog 60, so that whenever the live frog 60 is engaged by the free end of the dagger 63, the live frog 60 will move forwardly and thus move the 7 upper end of the brake member I I2 inwardly into engagement with the brake wheel II 0 to thus stop the loom immediately whenever the shipper handle 56 moves to an off position.

In the drawings and specification there has been set forth a preferred embodiment of the invention, and although specific terms are employed, the are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being defined in the claims.

I claim:

1. In a loom having a pair of side frames and an oscillatable lay provided with a shuttle box at each end thereof, each of said shuttle boxes having a pivoted binder and said lay having a protection rod oscillatably mounted thereon and provided with a torsion spring for normally tending to rotate it in one direction, said protection rod having uprising arms at each end thereof, the upper ends of which are adapted to engage the free end of the binders to press them inwardly relative to the shuttle boxes, each end of the protection rod having a forwardly projecting dagger mounted thereon and each side frame of the loom having a slidable fro mounted thereon adapted to be engaged by the associated dagger upon absence of a shuttle in both of the shuttle boxes upon the beat-up motion of the lay, said loom also having a shipper lever and means for normally holding it in operating position and said loom also having a knock-off lever adapted to be engaged by the sliding frog adjacent said knockoff lever when the dagger associated therewith engages the sliding fro adjacent the shipper lever, a transversely extending rod mounted on the front of the loom and having an arm on one end thereof adapted to engage the upper end of the knock-off lever to move the same and having an arm mounted on its other end and a link connecting said last-named arm with the sliding frog on the other side of the loom, so that upon absence of the shuttle in both of the shuttle boxes upon the beat-up motion of the lay, one or both of the daggers will engage its associated sliding frog and thereby move the knock-off lever to thus move the shipper lever to its off position.

2. In a loom having an oscillating lay provided with shuttle boxes having pivoted binders and having an oscillatable protection rod provided with a dagger at each end thereof and having a sliding frog at each side of the loom and also having a knock-off lever engageable by the sliding frog on one side of the loom, said loom also having a tubular starting rod and a shaft oscillatably mounted in the tubular starting rod and having an arm on one end adapted to engage the knock-01f lever and having an arm on the other end thereof and a connection between the lastnamed arm and the sliding frog on the side of the loom remote from the knock-off lever for also moving the knock-off lever when a dagger engages the sliding frog on the side of the loom remote from the knock-off lever.

GEORGE F. BAHAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 726,589 Stimpson Apr. 28, 1903 1,342,555 Lussier June 8, 1920 

